Periodic Table

Question 1

Which statements accurately describe Dmitri Mendeleev’s contributions to the development of the periodic table? Check all that apply.Mendeleev wrote the first modern chemistry textbook.Mendeleev produced the first orderly arrangement of known elements.Mendeleev ordered the elements by increasing atomic number.Mendeleev used patterns to predict undiscovered elements.Mendeleev accounted for variations resulting from isotopes.

Revolt · Accepted Answer

Mendeleev produced the first orderly arrangement of known elements.; Mendeleev used patterns to predict undiscovered elements.

Question 2

Which scientist arranged the elements in order of increasing atomic number, rather than increasing atomic mass?

Revolt · Accepted Answer

Henry Moseley

Question 3

The element aluminum (Al) is outlined in red on the periodic table.

Revolt · Accepted Answer

3; 13

Question 4

Question 5

Revolt · Accepted Answer

13

Question 5

Which statement accurately compares the trends in atomic number and atomic mass in the periodic table?

Revolt · Accepted Answer

Both the atomic mass and the atomic number increase from left to right.

Question 6

neutrons protons ✔ valence electrons

Revolt · Accepted Answer

✔ valence electrons

Question 7

Use the information in the square to answer the questions about tin.

Revolt · Accepted Answer

50; 69

Question 8

Question 18

Revolt · Accepted Answer

50

Question 9

Question 19

Revolt · Accepted Answer

69

Question 10

Question 29

Revolt · Accepted Answer

110

Periodic Table Answers

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